[KM-VM] Add SELinux rules for system internal properties

Bug: 368502791
Test: launch_cvd --secure_hals=guest_keymint_trusty_insecure
Test: atest VtsAidlSharedSecretTargetTest
Change-Id: I8205bec507f603ad19091abaff77036dc1895f92
diff --git a/private/property.te b/private/property.te
index 17e6d6e..65ef179 100644
--- a/private/property.te
+++ b/private/property.te
@@ -73,6 +73,7 @@
 system_internal_prop(suspend_debug_prop)
 system_internal_prop(system_service_enable_prop)
 system_internal_prop(ctl_artd_pre_reboot_prop)
+system_internal_prop(trusty_security_vm_sys_prop)
 
 
 # Properties which can't be written outside system